1∶20万区域重力资料二次开发在宁夏煤田预测中的作用  

The Application of Secondary Development of the 1∶200,000 Regional Gravity Data to the Coal Fields Prediction in Ningxia

作　　者：冯志民 

机构地区：[1]宁夏地球物理地球化学勘查院,宁夏银川750000

出　　处：《工程地球物理学报》2015年第6期760-765,共6页Chinese Journal of Engineering Geophysics

基　　金：宁夏回族自治区地勘基金项目宁夏区域重磁资料开发利用研究(编号:201407)

摘　　要：在覆盖区含煤远景预测中,地震勘探方法成本高、覆盖范围有限,不能进行大范围预测,而传统地质方法又受地表第四系覆盖,不能直接观测。根据宁夏地区1∶20万区域重力资料,采用小波分析方法预测了贺兰山北段、宁东、卫宁北山—香山、宁南等含煤远景。预测区中一部分与已知的煤田分布比较一致,而另一部分则可以作为远景区进一步工作,说明1∶20万重力资料的二次开发能够在覆盖区含煤远景预测中发挥作用。由于1∶20万区域重力资料比例尺太小,不能够准确控制局部重力异常的形态,因此预测的范围不够精确,建议在1∶20万远景预测的基础上进一步开展1∶5万等更大比例尺的重力测量。With high cost and limited coverage,seismic methods are not competent to predict the large scale coal bearing prospective areas.The traditional geological methods can not measure directly under the cover of the Quaternary sediments.Therefore,a wavelet analysis method on the 1∶200,000 regional gravity data is presented to predict the coal bearing areas in the north Helan mountain,east Ningxia,north Weining mountain-Xiangshan,and south Ningxia.Part of our prediction areas coincides well with known coal fields,and some other prospective areas could be instructive for future coal investigation.Due to the small measuring scale of the 1∶200,000 gravity data,our interpretation is incapable of describing the shapes of the local anomalies accurately.Therefore,the 1∶50,000 or a larger measuring scale gravity survey is suggested on the basis of the predictive results from the1∶200,000 gravity data.

关 键 词：宁夏地区 重力 含煤区 预测 

分 类 号：P631.1[天文地球—地质矿产勘探]